SPEED 300 RACER 2 Wn's is designed for the runner who wants to feel fast and light on his feet. Upper in mono mesh which is a light semi-transparent material that breathes and provides support. l with TPU which provides extra support in exposed areas. Midsole in PROFOAM that provides immediate cushioning. PROPLATE in the outsole which is made of nylon drives the runner forward to generate more speed. Rubber outsole for good grip and stability.